Where are these Lazarus books? All I see in these links is Delphi books.
The only Lazarus book I know of is in German. Anyone wanting to use Lazarus for now is compelled to learn Object Pascal from Delphi books.
It's not to difficult to make the transition especially if one sticks to Delphi 6 or 7 that have IDEs similar to that of the Lazarus IDE.